Cast Stoneforge Acolyte by paying {W/P}.
Defiler of Faith triggers, creating a 1/1 Soldier creature token.
Whenever Stoneforge Acolyte enters the battlefield, it and Ondu Cleric trigger.
Resolve the Stoneforge Acolyte trigger, putting a +1/+1 counter on it.
Resolve the Ondu Cleric trigger, causing you to gain at least two life.
Activate Phyrexian Altar by sacrificing the Soldier token, adding {W}.
Activate Sword of the Realms by paying {1}{W}, attaching it to Stoneforge Acolyte.
Activate Phyrexian Altar by sacrificing Stoneforge Acolyte, adding {1}.
When Stoneforge Acolyte dies, Sword of the Realms triggers, returning Stoneforge Acolyte from your graveyard to your hand.
Repeat.

Infinite death triggers

Infinite ETB

Infinite lifegain triggers

Infinite LTB

Infinite sacrifice triggers

Infinite storm count

Halvar, God of Battle // Sword of the Realms

Defiler of Faith

Phyrexian Altar

Ondu Cleric

Stoneforge Acolyte

Cast Stoneforge Acolyte by paying {W/P}.
Defiler of Faith triggers, creating a 1/1 Soldier creature token.
Whenever Stoneforge Acolyte enters the battlefield, it and Ondu Cleric triggers, causing you to gain at least two life.
Activate Phyrexian Altar twice by sacrificing Stoneforge Acolyte and the Soldier token, adding {1}{W}.
Whenever Stoneforge Acolyte dies, Sigil of the New Dawn triggers, causing you to pay {1}{W} to return Stoneforge Acolyte from your graveyard to your hand.
Repeat.

Sigil of the New Dawn

Combos with "Stoneforge Acolyte"